MATTINGLY V-Grip Boost Slow Pitch Softball Bats Mattingly V-Grip is a unique grip that improves performance The V-grip aligns the knocker knuckles and keeps the bat in the finger tips not in the palm, the result is batters are assured a proper grip every time and proven gain in performance. Increased bat speed and quicker hands more bat control promotes good habits and sound fundamentals The V-grip is approved by all major national baseball and softball organizations.